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smog

[smog, smawg] /smɒg, smɔg/
noun
1.
smoke or other atmospheric pollutants combined with fog in an unhealthy or irritating mixture.
verb (used with object)
3.
to cover or envelop with or as if with smog.
Origin
1900-1905
1900-05; sm(oke) + (f)og1
Related forms
smogless, adjective
desmog, verb (used with object), desmogged, desmogging.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for smog
  • Numerous studies have linked heart disease and air pollution, particularly smog.
  • Small efficient diesel engines with low smog and pollution emissions are the way to go.
  • But the sulphur that spews from the smokestacks of coal-fired power stations causes acid rain and the soot generates smog.
  • Long-term exposure to concentrated smog significantly raises the risk of dying from lung disease, a new study shows.
  • For environmentalists, the smog highlights several weaknesses in the region's societies.
  • The catalytic converter was designed to pull smog from car exhaust, and it does.
  • Paved roads and sprawl are likely to blame for summertime smog buildup.
  • We are still belching smoke and smog and dependent on both oil and coal.
  • The smog laws ultimately were mirrored across the country.
  • In the past it has used this right to make car manufacturers cut down the exhaust emissions that cause smog.
British Dictionary definitions for smog

smog

/smɒɡ/
noun
1.
a mixture of smoke, fog, and chemical fumes
Derived Forms
smoggy, adjective
Word Origin
C20: from sm(oke + f)og1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for smog
smog
1905, blend of smoke and fog, formed "after Lewis Carrol's example" [Klein; see portmanteau]. Reputedly coined in ref. to London, and first attested there in a paper read by Dr. H.A. des Voeux, treasurer of the Coal Smoke Abatement Society, though he seems not to have claimed credit for coining it.
Online Etymology Dictionary, © 2010 Douglas Harper
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smog in Medicine

smog (smŏg)
n.

  1. Fog that has become mixed and polluted with smoke.

  2. A form of air pollution produced when sunlight causes hydrocarbons and nitrogen oxides from automotive emissions to combine in a photochemical reaction.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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smog in Science
smog
  (smŏg)   
  1. A form of air pollution produced by the reaction of sunlight with hydrocarbons, nitrogen compounds, and other gases primarily released in automobile exhaust. Smog is common in large urban areas, especially during hot, sunny weather, where it appears as a brownish haze that can irritate the eyes and lungs. Ozone, a toxic gas that is not normally produced at lower atmospheric levels, is one of the primary pollutants created in this kind of smog. Also called photochemical smog.

  2. Fog that has become polluted with smoke and particulates, especially from burning coal.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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smog in Culture

smog definition


A haze or fog composed of water vapor, complex molecules, and suspended particles.

Note: In North America, the primary cause of smog is pollution from automobile exhaust.
Note: The Los Angeles basin, where pollutants can be trapped by inversions and the surrounding mountains, has frequent problems with smog, as do other major urban areas.
Note: The word smog is a combination of smoke and fog.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Related Abbreviations for smog

smog

smoke and fog
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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